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https://issues.apache.org/jira/browse/TRAFODION-3327?focusedWorklogId=322131&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-322131
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ASF GitHub Bot logged work on TRAFODION-3327:
---------------------------------------------
Author: ASF GitHub Bot
Created on: 02/Oct/19 18:38
Start Date: 02/Oct/19 18:38
Worklog Time Spent: 10m
Work Description: DaveBirdsall commented on pull request #1857:
[TRAFODION-3327] LOB support in T2 driver
URL: https://github.com/apache/trafodion/pull/1857#discussion_r330703710
##########
File path: core/conn/jdbc_type2/native/SrvrOthers.cpp
##########
@@ -1529,3 +1529,127 @@ odbc_SQLSvc_CloseUsingLabel_sme_(
}
FUNCTION_RETURN_VOID((NULL));
}
+
+extern "C" void
+odbc_SQLSrvr_ExtractLob_sme_(
+ /* In */ void *objtag_
+ , /* In */ const CEE_handle_def *call_id_
+ , /* Out */ odbc_SQLsrvr_ExtractLob_exc_ *exception_
+ , /* In */ long dialogueId
+ , /* In */ IDL_short extractLobAPI
+ , /* In */ IDL_string lobHandle
+ , /* In */ IDL_long_long &lobLength
+ , /* Out */ IDL_long_long &extractLen
+ , /* Out */ BYTE *& extractData
+ )
+{
+ char lobExtractQuery[1000] = {0};
+ long sqlcode;
+ SRVR_STMT_HDL *QryLobExtractSrvrStmt = NULL;
+
+ if ((QryLobExtractSrvrStmt = createSrvrStmt(dialogueId,
"MXOSRVR_EXTRACTLOB", &sqlcode,
+ NULL, 0, 0, TYPE_UNKNOWN, false,false)) == NULL)
+ {
+ exception_->exception_nr = odbc_SQLSvc_ExtractLob_SQLInvalidhandle_exn_;
+ return;
+ }
+ switch (extractLobAPI) {
+ case 0:
+ snprintf(lobExtractQuery, sizeof(lobExtractQuery), "EXTRACT
LOBLENGTH(LOB'%s') LOCATION %llu", lobHandle, (Int64)&lobLength);
Review comment:
Is there a maximum size on strlen(lobHandle)? If not, then long lobHandle
values (on the order of 980 characters or so) will cause truncation of
lobExtractQuery, resulting in a SQL error. One way to work around this is to
use a dynamic array size when declaring the lobExtractQuery array, so we can
guarantee enough space.
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Issue Time Tracking
-------------------
Worklog Id: (was: 322131)
Time Spent: 40m (was: 0.5h)
> LOB support in T2 driver
> ------------------------
>
> Key: TRAFODION-3327
> URL: https://issues.apache.org/jira/browse/TRAFODION-3327
> Project: Apache Trafodion
> Issue Type: New Feature
> Components: client-jdbc-t2
> Reporter: Selvaganesan Govindarajan
> Priority: Major
> Time Spent: 40m
> Remaining Estimate: 0h
>
> LOB support in T2 driver doesn't use the concepts of LOB in Trafodion SQL
> engine. The existing code used the legacy code that was inherited from HP
> that couldn't be used with new CLOB/BLOB concepts in Trafodion SQL engine.
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